Can you see the REX Cement Stop on an X-ray photo?

Yes, indirectly. The bone cement shows the contour of the top of the REX Cement Stop, which is not radiopaque. Also, there is no leakage of bone cement (which is radiopaque) distally from where the REX Cement Stop has been positioned, so you can indirectly see the REX Cement Stop on an X-ray and verify that it has functioned correctly, see figure on the right.